干旱区生态环境知识资源中心(Arid): Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments

Arid

DOI	10.1016/j.quaint.2020.03.037
	Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments
	Bartz, Melanie; Duval, Mathieu; Brill, Dominik; Zander, Anja; King, Georgina E.; Rhein, Alexander; Walk, Janek; Stauch, Georg; Lehmkuhl, Frank; Brueckner, Helmut
通讯作者	Bartz, M
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2020
卷号	556 页码:124-143
英文摘要	Coastal alluvial fans (CAF) are important geo-archives due to their sensitivity to both tectonic activity and climatic changes. Thus, they can give key insights for geomorphic and sedimentary processes. In this study we test the potential of K-feldspar post infrared-infrared stimulated luminescence (pIR-IRSL) and quartz electron spin resonance (ESR) methods for dating alluvial fan complexes in arid environments. The existing chronological data from marine terraces that interact with CAF make the Atacama Desert in northern Chile an excellent setting for this research. Samples have been collected from alluvial, marine and aeolian sediments embedded in the CAF complexes, allowing evaluation of the different signal properties and bleaching characteristics of the pIR-IRSL and ESR signals over Late Pleistocene time scales. pIR-IRSL dose distributions of clast-rich alluvial fan samples are characterised by higher scatter and demonstrate heterogeneous bleaching, while matrix-rich alluvial fan deposits show rather homogeneous poor bleaching in the dose dispersion as indicated by a modern analogue sample. In contrast, marine and aeolian deposits are homogeneously well bleached, supported by a modern littoral sample. Following the quartz multiple centre (MC) ESR dating approach (Al and Ti centres), bleaching of the different centres prior to deposition has been achieved. While the Ti-H centre provides mostly lower doses than the Ti-Li centre, in most cases the Al centre provides the highest dose values. This pattern is consistent with their respective bleaching kinetics and suggests that the Ti centre signals most likely provide the closest estimate to the true burial dose for samples with doses > 200 Gy. ESR and pIR-IRSL ages are consistent at 2 sigma for the marine, aeolian and clast-rich debris-flow deposits, which is in agreement with existing chronological data in this area. It appears that the mode of sediment transport on alluvial fans, either as matrix- or clast-rich flows, plays an important role in sediment bleaching. While clast-rich alluvial fan deposits are likely better bleached, we cannot exclude insufficient bleaching during matrix-rich alluvial fan flows; our dating results suggest that both pIR-IRSL and ESR dating overestimate the true burial age. The combination of pIR-IRSL and MC ESR dating can be considered as a promising tool for deciphering alluvial fan formation over (Late) Pleistocene time scales.
英文关键词	Atacama desert ESR dating Luminescence dating Alluvial fans Marine terraces Aeolian deposits
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579725900011
WOS关键词	ELECTRON-SPIN-RESONANCE ; INFRARED-STIMULATED LUMINESCENCE ; HOLOCENE DEBRIS FLOWS ; RIVER EBRO BASIN ; NORTHERN CHILE ; DOSE-RATE ; LANDSCAPE EVOLUTION ; SEDIMENTARY QUARTZ ; MIDDLE PLEISTOCENE ; FADING-CORRECTION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326875
作者单位	[Bartz, Melanie; Brill, Dominik; Zander, Anja; Rhein, Alexander; Brueckner, Helmut] Univ Cologne, Inst Geog, Albertus Magnus Pl, D-50923 Cologne, Germany; [Duval, Mathieu] Griffith Univ, Australian Res Ctr Human Evolut ARCHE, Environm Futures Res Inst EFRI, Nathan, Qld 4111, Australia; [Duval, Mathieu] Ctr Nacl Invest Evoluc Humana CENIEH, Paseo Sierra de Atapuerca 3, Burgos 09002, Spain; [Bartz, Melanie; King, Georgina E.] Univ Lausanne, Inst Earth Surface Dynam, CH-1015 Lausanne, Switzerland; [Walk, Janek; Stauch, Georg; Lehmkuhl, Frank] Rhein Westfal TH Aachen, Dept Geog, Wullnerstr 5b, D-52056 Aachen, Germany
推荐引用方式 GB/T 7714	Bartz, Melanie,Duval, Mathieu,Brill, Dominik,et al. Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments[J],2020,556:124-143.
APA	Bartz, Melanie.,Duval, Mathieu.,Brill, Dominik.,Zander, Anja.,King, Georgina E..,...&Brueckner, Helmut.(2020).Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments.QUATERNARY INTERNATIONAL,556,124-143.
MLA	Bartz, Melanie,et al."Testing the potential of K-feldspar pIR-IRSL and quartz ESR for dating coastal alluvial fan complexes in arid environments".QUATERNARY INTERNATIONAL 556(2020):124-143.